Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Optimal Carrier Loading for the Enhancement of Visual Quality over OFDMA Cellular Networks

무선 셀룰러 네트워크에서 다층 코딩을 이용하여 비디오 화질을 향상하기 위한 자원할당 기법 연구

  • Jang, Uk (School of Electrical and Electronic Engineering Yonsei University) ;
  • Lee, Hyung-Keuk (School of Electrical and Electronic Engineering Yonsei University) ;
  • Lee, Sang-Hoon (School of Electrical and Electronic Engineering Yonsei University)
  • 장욱 (연세대학교 전기전자공학부) ;
  • 이형극 (연세대학교 전기전자공학부) ;
  • 이상훈 (연세대학교 전기전자공학부)
  • Published : 2008.06.18
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Abstract

A recent dynamic increase in demand for wireless multimedia services has greatly accelerated the research on dynamic channel adaptation of high quality video applications. In this paper, we explore a theoretical approach to cross-layer optimization between multimedia and wireless networks by means of a quality criterion termed "visual throughput" for downlink video transmission using a layered coding algorithm. We obtain the optimal loading ratio of orthogonal frequency division multiple access (OFDMA) subcarriers through an optimization problem balancing the trade-off relationship between inter-cell interference (ICI) and channel throughput. In the simulation, we show that the visual throughput gain at the cell boundary is increased by about 32%.

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